In order to investigate how fibers affect asphalt binder in low-temperature ductility, shear resistance, apparent viscosity and high-temperature rheology, ductility test, cone penetration test, Brookfield viscosity test and dynamic shear rheology test were applied and total adding mass and volume ratio of two type of fibers were considered. And cross sections morphology of samples were observed by scanning electronic microscope. Results showed that increasing addition of fibers could reduced low-temperature ductility. Viscosity was improved by increasing fiber addition but improvement seemed slower when adding proportion was close to 6%; while shear resistance and rut factor (G*/sinδ) performed better when volume ratio of steel wool and brucite fiber was 6/4.Therefore,rutting resistance can be improved by viscosity growth and bridging induced by well dispersion and interaction between binder and fibers.
Qin Xiao,Shen Aiqin,Guo Yinchuan.Experimental study on road performance of basalt fiber reinforced bitumen mastics[J].Journal of Building Materials, 2016(4):659(in Chinese).
Apostolidis P, Liu X, Scarpas A , et al. Advanced evaluation of asphalt mortar for induction healing purposes[J]. Construction and Building Materials, 2016,126:9.
4
García Alvaro, Norambuena-Contreras J, Manfred N . Experimental evaluation of dense asphalt concrete properties for induction heating purposes[J]. Construction and Building Materials, 2013,46:48.
5
García Alvaro, Moises Bueno, Jose Norambuena-Contreras , et al. Induction healing of dense asphalt concrete[J]. Construction and Building Materials, 2013,49:1.
6
García Alvaro, Norambuena-Contreras J , et al. Uniformity and mechanical properties of dense asphalt concrete with steel wool fibers[J]. Construction and Building Materials, 2013,43:107.
7
Guan Bowen . Application of fiber brucite reinforced concrete in highway engineering[D]. Xi’an:Chang’an University, 2010(in Chinese).
8
关博文 . 水镁石纤维路面混凝土公路工程应用研究[D]. 西安:长安大学, 2010.
9
Wang Yan . Application of fiber brucite reinforced concrete in highway engineering[D]. Xi’an:Chang’an University, 2012(in Chinese).
10
王燕 . 水镁石纤维混凝土路面材料及结构设计研究[D]. 西安:长安大学, 2012.
11
Li Feng . The research on the durability of the fiber brucite in the concrete[D]. Xi’an:Chang’an University, 2012(in Chinese).
12
李锋 . 水镁石纤维混凝土的耐久性研究[D]. 西安:长安大学, 2012.
13
Xiong Rui, Yang Xiaokai, Yang Fa, et al.Laboratory investigation of performance of coal gangue powder/brucite fiber modified asphalt mortar[J].Journal of Wuhan University of Technology, 2016(2):11(in Chinese).
Xiong Rui, Guan Bowen, Sheng Yanping . Anti-fatigue property of brucite fiber reinforced asphalt mixture under sulfate and dry-wet circle corrosion environment[J]. Journal of Wuhan University of Technology, 2014,36(10):45(in Chinese).
Wu Mengmeng, Li Rui, Zhang Yuzhen , et al. Study of high and low temprerature performance of fiber-asphalt mortar[J]. Journal of China University of Petroleum(Edition of Natural Science), 2015,39(1):169(in Chinese).
Chen Huaxin, Xu Qinwu . Experimental study of fibers in stabilizing and reinforcing asphalt binder[J]. Fuel, 2010,89:1616.
20
Chen Huaxin, Zhang Zhengqi, Hu Changshun . Interaction mechanism of asphalt with fiber in pavement[J]. Journal of Chang’an University(Edition of Natural Science), 2002,22(6):5(in Chinese).
Song Yunxiang, Wei Youpo, Li Yumei , et al. Road performance of basalt fiber reinforced asphalt mastic[J]. Journal of Highway and Transportation Research and Development, 2012,29(8):15(in Chinese).
Ye Qunshan, Wu Shaopeng . Rheological characteristics of polyester fiber modified asphalt mastic[J]. Journal of Highway and Transportation Research and Development, 2009,26(9):37(in Chinese).
Chen Huaxin, Zhang Zhengqi, Hu Changshun . Low-temperature anti-cracking performance of fiber-reinforced asphalt mixture[J]. Journal of South China University of Technology(Edition of Natural Science), 2004,32(4):82(in Chinese).
Chen H, Xu Q , et al. Evaluation and design of fiber reinforced asphalt mixture[J]. Material and Design, 2009,30:2595.
29
Dong Biqin, Han Ningxu, Ding Zhu , et al. A preliminary study of synthesized-insitu fiber in cement materials[J]. Construction and Buil-ding Materials, 2013,40:10.